Reference

Exodus 7:8

And the Lord spake unto Moses and unto Aaron, saying,
6

And Moses and Aaron did as the Lord commanded them, so did they.

7

And Moses was fourscore years old, and Aaron fourscore and three years old, when they spake unto Pharaoh.

8

And the Lord spake unto Moses and unto Aaron, saying,

9

When Pharaoh shall speak unto you, saying, Shew a miracle for you: then thou shalt say unto Aaron, Take thy rod, and cast it before Pharaoh, and it shall become a serpent.

10

And Moses and Aaron went in unto Pharaoh, and they did so as the Lord had commanded: and Aaron cast down his rod before Pharaoh, and before his servants, and it became a serpent.